Low-distortion line scanning lens

A lens and lens technology, applied in the lens field, can solve the problems of large optical distortion and low resolution, and achieve the effect of flexible adjustment of the clear aperture

Pending Publication Date: 2019-10-18
GUANGDONG AOPUTE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing line scan lenses in China often have shortcomings such as large optical distortion and low resolution, so the research and development of low distortion line scan lenses with higher optical performance is more urgent

Method used

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Embodiment Construction

[0024] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal" etc. are based on t...

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Abstract

The invention belongs to the technical field of lenses, and particularly relates to a low-distortion line scanning lens. The low-distortion line scanning lens comprises a mechanical system and an optical system installed in the mechanical system; and the optical system comprises a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6 and a seventh lens G7 which are sequentially arranged from an object space to an image, wherein the first lens G1 has positive focal power and a meniscus structure, the second lens G2 has positive focal power and a meniscus structure, the third lens G3 has negative focal power and a meniscus structure, the fourth lens G4 has negative focal power and a biconcave structure, the fifth lens G5 has positive focal powerand a biconvex structure, the sixth lens G6 has negative focal power and a biconcave structure, and the seventh lens has positive focal power and a biconvex structure. The resolution ratio of the low-distortion line scanning lens can reach 100 lp / mm, that is to say, when the low-distortion line scanning lens corresponds to a maximum imaging chip, the pixel of the low-distortion line scanning lenscan reach 12K, and the maximum optical distortion in a full field is lower than 0.05%; and a whole group focusing mode is adopted, the clear aperture of the low-distortion line scanning lens can be flexibly adjusted.

Description

technical field [0001] The invention belongs to the field of lens technology, and in particular relates to a low-distortion line-scan lens. Background technique [0002] In the wave of industrial automation, machine vision systems are widely used in all walks of life. In precision inspection applications such as electronic manufacturing, LCD screen size measurement, and circuit board pin inspection, line-scan lenses are often used in conjunction with line-scan cameras to obtain images. At this time, lens distortion is an extremely important consideration in machine vision systems, which directly affects The precision of the vision system. However, the existing domestic line scan lenses often have shortcomings such as large optical distortion and low resolution. Therefore, the research and development of low-distortion line scan lenses with higher optical performance is more urgent. [0003] It can be seen from the above that the relevant technology needs to be improved urg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/005G02B13/006
Inventor 林佳敏曾振煌卢盛林
Owner GUANGDONG AOPUTE TECH CO LTD
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